Roman blinds given the radiator, shades and blinds add no softness or color.

Do panels and shades like you see below.

Can you have drapes with how your heating vents are? If so, what Beverly posted is what I’d do. Beautiful look, and adds softness.

For the other windows, can you get a photo from farther back? It’s hard to tell context.

You can have drapes with baseboard heat. They are stationary panels. The blinds will provide privacy.

roman rattan blinds set inside the sills. keep the trim showing. otoh, down/up blinds might be better -- so u have privacy on lower window 1/2 and light coming in top 1/2.